Business Base effect, lower crude oil production decelerate July core factory output Updated : August 31, 2018 09:23 PM IST The ECI index represents major sectors like coal, steel, cement and electricity. On a sector-specific basis, refinery products, which has the highest weightage of 28.03 percent, grew by 12.3 percent in July 2018. Subscribe to Moneycontrol PRO at just Rs.33/- per month for the first year. Use code SUPERPRO. Limited period offer. Available on Web and Android.